Overview
Salaries
Products
People
Growth
Offices
Financials

Funding and backers

Backers
1
Y Combinator
Momentum
0/100
no fresh signals
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Oct 2026 Went through Y Combinator
Tractionpublic signals, read monthly
Web presence
top 2%
of 133.2M domains by links, Common Crawl
GitHub stars
3 public repositories
Launched on Hacker News
2 points
Backed byfrom the funds' portfolios and accelerator catalogs
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Overview

OpenSEO is the open source alternative to Ahrefs and Semrush. Keyword research, backlinks, rank tracking, and site audits, billed by usage instead of a $100-plus monthly subscription. Self-host it free, or connect it to your AI agents over MCP.